1) main low frequency draging
主井低频拖动
2) low frequency drive system
低频拖动
1.
Based on low frequency drive system of the DPB550/150 Ⅱ type an intelligent control strategy applied to the speed control of AC mine hoist is described and a satisfactory control performance is obtained.
以ＤＰＢ－５５０／１５０－Ｉ型中国矿业大学低频拖动系统为基础，应用智能控制策略，实现了交流提升机的速度控制，得到了较好的恒减速控制性能，解决了矿井交流提升机在减速段和爬行段的速度控制性能较差以及在负载变动时，很难实现恒减速的问题。
3) downhole low-frequency
井下低频脉动
1.
To direct toward the lower recovery rate of waterflooding because of formation blockage and oil pool lack of homogeneity,downhole low-frequency pulsing injection technology was put forward.
针对油层堵塞、油藏非均质性严重,导致水驱采收率较低这一实际问题,提出了井下低频脉动注水技术。
4) Low-frequency Active Sonar
低频主动声纳
1.
With analyzing the detecting procedure of Low-frequency active sonar and emulating about it, the Optimum Detection Frequency Band of Low-frequency Active Sonar were researched.
低频主动声纳是对传统的高频主动声纳的一种重大改进,它能利用低频主动声信号实现对水下目标的远距离探测。
5) Inverter Towage
变频拖动
补充资料：白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条